Cum Ring
The glob of cum that tends to land on the top of your index finger while ejaculating during masturbation.
Dude, i had the biggest cum ring on my finger today after i blew my load jacking off to midget porn
Cum Rings
When you ejaculate and a stream of cum flows down all four of your fingers while your hand is on your dick. Therefore giving off the appearance of of having rings of cum.
"Man I ejaculated so hard I got cum rings!"
Bobo Cum Ring
White ring formed around a person's mouth similar to a clown (Bobo) from the type of chap stick made for 80s lifeguards. Tends to leave white, visible residue similar to those seen after the climax in clown porn scenes.
Dude what's up bobo cum ring? What's all over your mouth? Did you just blow a clown?